Process of manufacturing condensed milk.



M. VOUGA. IROGESS OF MANUFACTURING CONDENSED MILK. APPLICATION FILED JUNE 11, 1912 1,062,133, Pat nted May 20, 1913."

I I 1/ F;

a J f 2 L4 f 0]., i2, I H l,

Wren erases earner session MAURICE VOUGA, OF CORTAILLGD, SW ITZERLAND.

rnocnss or 'trnnuractrnnnve connnnsnn MILK.

resales.

To all whom it may concern y Be t known that I, Mnnnron VOUGA, a

- citizen of the Swiss Republic, residing at Cortaillod, Neuchatel, Switzerland, have invented certain new and useful Improvements H1 Processes of Manufacturing G ndensed Milk and the Like, of which thefcllowing is a specification. I v

This invention relates to an improved process for, manufacturing-condensed milk and the like.

he manufacture of condensed milkac cording to the known processes and wlth the known, apparatus presents one or more of the following disadvantages, namelyz- The solid constituents of the milk Tare burned, discolored, rendered insoluble or distasteful, or otherwisev injuriously ail'ected' by excessive heating or prolonged contact with an adhesion to a heated surface? the temperature of the milk duringconcentration is not regulated correspondingly to the progressing concentration; the heat is not economically utilized; paratlvely slow.

The present invention overcomes the disadvantages aforesaid and enables the pro the output is comduction of condensed milk :in which the ently heating eachsurface to a tempera ture lower than" that of the preceding one so as to heat the milk successively to temperatures corresponding to the increase in its degree of concentration.

The preferred form of apparatus for the manufacture of condensed milk, which is particularly adapted for carrying out said -process,' comprises the combination, of a chamber the interior ofwhich is preferably adapted to bebrought under reduced pressure, a series of superposed funnels therein arran ed alternately in normal and JR verte positions so as'to present surfaces alternately sloping downward from out- Ward to the center and downward from the center outward and thereby forming a zigzag course for the milk to flow down, means Specification of Letters Patent.

for independently heating the funnels to difi'erent temperatures those above higher than those below, means for feeding the milk onto the uppermost funnel, and means for spreading the milk in a film around the Patented May 2%, 1e13, Application filed June 11, 1912. Serial No. 702,968.

funnels and preventing it from adhering thereto while it is flowing downward.

I have shown in the accompanying drawing by way of example a diagrammatic representation, in vertical section, of one form of construction of said apparatus.- I

Referring to the drawing, a represents the chamber, which is preferably cylindrical in form, provided with an exhaust pipe, y, connected to a pump or other extractor.

z',-z", i ii, i represent the series of superposed funnels, supported within the chamher in any convenient manner and arranged alternately in normal. and inverted positions as shown. The funnels are of less diameter than the cylinder. soas to leave a free space at the sides for the vapors to passup.

Further, the funnels are so shaped and are of such dimensionsatitheir centerthrough holes and outer'borders as to enable the milk to flow from one funnel onto that next below, The funnels are provided under- I1( %B;tl1Wli3l1 jackets,- 7', communicating with p1pes, k, for conducting steam, .or other heating medium thereto,.suitahle outlet or return pipes, not shown, being previded. f

' Z represents pressure reducers, or equivalent means for controlling the temperatures of the respective funnels as aforesaid. Shields may be provided over the parts of the pipes, 76, within the chamber, a, to pre-;

vent the milk from coming intocontact with or accumulating upon the former.

b is a rotary shaft mounted within the cylinder in lower and upper bearings, a, (Z,

mounted fast on the shaft, respectively,

one above each lower funnel. The arms mayextend over the edges of -the runnels. The arms may be rigid and ar faces of the funnels, or may be provided along their edges with yielding or resilient blades or strips which maycontact with such surfaces.

ranged slightly out of contact with the sur while being spread out 'funnel and prevented of the cylinder, 11, 1s at the bottom df the center hole of the'lowerlets controlled by valves, '0, with containers, w.

u isa p pe, controlledby a valve, 15, for

admitting aseptic air into the reservoir, s, whenit is desired to empty same into either container, 'w; l

or: represents stop cooks provided on the containers, w. The reservoir, 5, and the containers, 'w,-are or may be readily disconnectible.

l-In carrying chamber, a, is sterilized by introducing steam or hot air through the pipe, m, and the reservoir, 8, and containers, w, are sterilized. RThe valves, a, 0,

the valve, '1', being opened, the pump or other extractor :acting through thepipe y, is set in .-:action. Further, the pressure valves, Z, controlling the admission of steam to the jackets, are adjusted so that the tunnels are heated the-desiredrespective temperatures. The milk to he treated is then introduced into the cylinder, a, -by the valve, g, the hollow arm '6, and the outlet apertures, f, so that it .isdistribut cdaround the upper outer border (if-the uppermost and hottest'funnel, 2', and flows downward toward its center all the in a film around the from adhering to its surface by the arm, e. The heat and reduced pressure cause the film'of milk to rapidly give up a portion of its water content, and the vapor passes away by the exhaust, 7 'From the funnel, i, the partly condensed ulflk flows onto the central part of the in- =verted funnel, i, heated to a lower temperaturethan the funnel, 2',.and flows downward to the outer edge of the tunnel, i all the while being spread out in a film around the funnel and prevented from adhering to its surface by the respective arm, h, so that a further portion of the water is evaporated and passes away. From the funnel, i the water of eenelensationwtliich 'mayfhethence is conductedfor conducting the condensedmilk the cylinder, (1, through a-valve, 13, into any convenient reservoir, 5; The reservoir, 8, may communicate by outout the process by- 'means' of the apparatus described and shown, the

t, 2:,- being closed, and l still further partly condensed milk flows firstly ontoathe--funnel, i then-onto the funnel, 2' and then onto the funnel, i, as will be readily understood.

The degree to which each respective funnel should be heated-may be readily ascertained for .any particular construction of apparatus by known tests and reactions.

From the last funnel, i, the condensed milkflows through the conduits, g, and the valve, 1-, into thereservoir, s. 'Thecondensed milk may be emptied from the reservoir, 8, into receptacles, w.

Inspection glasses may be provided to enable the operation and progress of .the treatment t'obe watched, and manholes may be provided to facilitate cleaning.

The apparatus is of advantage in that it enables the quantity of milk treated and the temperaturesto which the milk isheated the process to be continuously carriedout in one piece of apparatus.

As the whole treatment 'may be carried out protected from the atmosphere aseptic conditions, the milk maybe partially treated and preserved in the containers, 'w, to be finished on a lateroccasion.

Although the invention has only been described with reference to treating milk, I

larly suitable for and that the claims are intended to cover its use for treating mixtures of milk and cocoa, milk and coffee, and the like.

Having now described my. invention 1 claim as new and desire to secure hyLetters Patent p 'The improved process of.manuactu'ring condensed milk consisting in flowing the milk to be treated, while under reduced pressure and protected from impure air down a series of inclined surfaces simultaneously spreading it out in a 'film in 'a direction at an angle to that of its flow, and independently heating each surface to a temperature lower than that of the preceding one so as to heat the milk successively to lower temperatures corresponding to the increase of its degree of concentration, substantially as described.

In testimony whereof, I have aifi-Xed my signature in the presence of two witnesses.

, MAURICE vouoa. Witnesses:

F. L. COLONY,

, EniE l-Lanussnun.

copies of this patent may be obtained for live cents each, by-addressing the Commissioner ailments, klashingtcn, D. G.

to be readily regulated, furthenitenables- Wish it to be understood that it is vparticuand under 

